Modulo-2 Pi Phase Sequence Estimation.
COLORADO STATE UNIV FORT COLLINS DEPT OF ELECTRICAL ENGINEERING
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The probabilistic evolution of random walk on the circle is studied and the results used to derive a MAP sequence estimator for phase. The sequence estimator is a Viterbi tracker for tracking phase on a finite-dimensional grid in -Pi, Pi. The algorithm is shown to provide a convenient method for obtaining fixed-lag phase sequence estimates. Performance characteristics are presented and compared with several other nonlinear filtering algorithms. The results indicate superior performance over the range of parameter values usually considered and excellent performance in parameter ranges corresponding to high signal-to-noise ratio and rapidly fluctuating phase. Applications to coherent data communication systems are outlined. Author
- Theoretical Mathematics
- Non-Radio Communications